This is a possible concise summary:
The text is a transcript of a video that lists 10 extinct creatures that are scarier than dinosaurs. The video provides some facts and descriptions of each creature, such as their size, habitat, diet, and hunting methods. The creatures include marine reptiles, giant insects, land lizards, sea scorpions, and crocodiles. The video also mentions some theories and discoveries about these creatures, such as their possible survival or extinction. The video ends with a bonus joke about a literate dinosaur called thesaurus. The video invites the viewers to comment, like, share, and subscribe.
Here are the key facts extracted from the text:
- The text is about 10 extinct creatures that were very scary and a bonus dinosaur that could read.
- The 10 creatures are: Liopleurodon, Arthropleura, Megalania, Dunkleosteus, Jaekelopterus, Deinosuchus, Titanoboa, Meganeura, Helicoprion and Gorgonops.
- Liopleurodon was a giant marine reptile that could reach 10 meters in length and had a powerful sense of smell and fast fins.
- Arthropleura was a huge centipede-like arthropod that was herbivorous and lived in North America and Scotland.
- Megalania was the largest land lizard that ever existed and lived in Australia. It could grow up to 7 meters long and weigh over 600 kilograms. It was an active hunter that may have eaten some dinosaurs.
- Dunkleosteus was a massive armored fish that lived in the late Devonian period. It had a four-bar linkage mechanism for opening its jaws that allowed it to snap them shut in 20 milliseconds. It had few teeth but could slice through its prey with its bony plates. It also practiced cannibalism.
- Jaekelopterus was a giant predatory sea scorpion that lived in the early Devonian era. It was the largest arthropod of all time, reaching almost 2.5 meters in length. It had spring-loaded arms and claws to catch and cut its prey, which included fish and possibly smaller sea scorpions.
- Deinosuchus was a distant relative of living crocodiles that lived about 112 million years ago. It was twice the size of modern crocodiles and weighed up to 7,700 kilograms. It had telescopic eyes and a long snout with many teeth. It may have eaten some dinosaurs.
- Titanoboa was the largest snake ever discovered, with a length of almost 14 meters and a weight of around 1,150 kilograms. It lived in northeast Colombia and hunted by constricting its prey, which included birds and crocodiles.
- Meganeura was the largest insect of all time, with a wing length of 33 centimeters and a body of almost 43 centimeters. It was a giant dragonfly that lived in the Permian period. It hunted like modern dragonflies, using its large eyes and spiny legs to catch its prey.
- Helicoprion was a fish shark that lived about 290 million years ago. It had a circular jaw that operated like a circular saw, slicing and grinding its prey. It lived in North America, Eastern Europe, Asia and Australia. Some scientists believe that it was not a shark but a relative of the chimaera, a type of deep-sea fish.
- Gorgonops was a dominant predator that lived about 260 million years ago, before the dinosaurs. It was about three meters long and weighed almost 450 kilograms. It had huge canines that protruded beyond its lower jaw. It had legs that supported its body from below, allowing it to run faster than its prey. Some theories suggest that it may have been warm-blooded and had some fur.
- The bonus dinosaur that could read was called Thesaurusaurus, which means "thesaurus lizard" in Latin. It was easy to identify by its book or magazine and its habit of looking for synonyms. It hunted rexes, ate food and thought about words.
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